They are paying for the right to use your property, not abuse it.

At that point you can return application fees and docs to those unprocessed applicants that want them back.If you deny an app, immediately prepare and send by regular mail or email an adverse action letter.

Passing the turing test is extremely difficult, to my knowledge only one artificially intelligent bot somewhat passed it, some people deny that. 

We regularly deny ESAs. 

Abus is the next best but you'll pay for it.

Everything was going smooth until my lender denied my loan application.

That was denied with all types of excuses.

I just read some articles and turns out that landlords cannot deny a tenant based solely on their criminal history during the pre-rental inquiry process.

We've been managing our own units for 5 years now and have had very few issues beyond needing to repaint a unit and patch some holes in walls from intentional abuse.  

FYI chase has a 5/24 rule which is cant open more than 5 cards in the last 24 months or they will deny you. amex has its own set of rules. also need to read the fine print some cards are once per lifetime signup bonus. there is a load of info out there on flyertalk forums, also you can check out the points guy or boardingarea. good luck going down the rabbit hole lol.